All versions incorporate two 3-inch mid-range drivers, a 1-inch tweeter and a central bass reflex port, while the larger XW-SMA4 adds an extra tweeter and a 4-inch subwoofer for deeper bass. For transporting your tunes from the bathroom to the poolside, the splash-proof XW-SMA3 offers a water-resistant casing and a rechargeable battery supporting up to five hours of indoor/outdoor AirPlay antics.

Color options are limited to black (for all three), or an optional white finish for the XW-SMA1 and XW-SMA3 models. Priced at £250 (XW-SMA1), (£300) XW-SMA3, and (£350) XW-SMA4, Pioneer’s new AirPlay trio should be available by September.

I warn everyone of purchasing Pioneer, since their AirPlay implementation is notoriously poor.
It is a lag of a few milliseconds at best compared to other airplayunits playing simultaneous. At worst, running AirPlay makes the whole unit reboot.